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  1. Va,Ia exeed limiting values in datasheeds ?
  2. Old DIYtube ST-35 electrolytics - swap?
  3. What Hammond for UK?
  4. What would you build with this transformer set?
  5. EL86 / 6CW5 + 6BQ7A amp design
  6. Western Electric theater amplifiers; how to hook them up?
  7. 12AU7,12B4A PSE schematic needs finishing!
  8. Dual grid and plate pins
  9. Best sounding ECC83 ?
  10. tube output for Playstation 1
  11. 6GX8 as Audio Level Indicator?
  12. Wurlitzer 6150 Organ Tube Amp convert Guitar Amp
  13. help on 12AU7 Preamp circuit
  14. Anyone bought tubes from http://www.nostubestore.com/ ?
  15. Tube pre-amp with exposed tubes?
  16. Using low voltage lamp in power supply
  17. GU 50 monoblock
  18. KT-88 Push Pull with CFB
  19. 12AX7 + ?? Ideas 2A3 // 6L6
  20. Formula for driver current requirement ?
  21. Need a little help with a regulator circuit if you are willing.
  22. Troubleshooting help for 12AQ5 amp
  23. Can anyone help with an ef86 tape preamp mod please?
  24. Herald Amp
  25. To switch B+ or not?
  26. All-tube vs tube/mosfet hybrid ?
  27. 6c33c-b question
  28. 12AT7 substitutes?
  29. 1st project salvaged sears receiver iron need good amp schematic
  30. FM-3 ? About parts replacement in IF stages
  31. simple EL84 parallel?
  32. Finished: Claus Byrtih EL34 amplifier on Isophon BS35 speaker set
  33. Yet another resistor thread
  34. Bogen CHB100 Valve Question
  35. 1st build; Adding load to PT secondary
  36. need help RCA RS 199C
  37. Unusually high Gm
  38. RH84 motorboating, stereo vs mono
  39. Use a tube rectifier for grid bias voltage, AA5 Radio tubes and usage.
  40. Cathode bypass with Long tail pair
  41. new chinese tube manufacturer
  42. Black Gate WKZ - can they be used in these circuits?
  43. Yet another question about HV Maida Regs
  44. Question about vacuum tubes
  45. Scott 299D Calibration
  46. Score! Bag-O-tubes!
  47. Building a tube integrated amp
  48. Audio Note Kits L1 Build...
  49. Need help with old mic amp
  50. Temporary hum
  51. Unidentified Tube - One for the detectives!
  52. Rogues?
  53. What about big tube RV278 Telefunken?
  54. variac variable transformer
  55. Tube amp OPT for Headphone Amp? (impedance matching question)
  56. current needed for 4x50l6 & 3x6sn6
  57. 6N11 tube work at 24V power supply?
  58. Heater voltage 5volt!
  59. help me choose a high end opt for tubelabs SE!
  60. 6L6/807 AB2 triode-- screen drive?
  61. help troubleshooting
  62. Anode Follower Article
  63. ECC802S 12AU7 ECC82 heater question
  64. Books for amplifiers
  65. E180F Preamp
  66. Don Allen Amp's ????
  67. To connect or not to connect..........
  68. Phonostage with tube moving coil
  69. 300b tube Temperature?
  70. Center tap transformer for elevated heater supplies
  71. single ended kt88 fuse blowing after an hour
  72. Help getting more gain from a Peavey Butcher
  73. Radiotron question
  74. suggested use for old telefunken tubes
  75. Using different ouputs for two different drivers
  76. Pete Millett Uniamp with 300b
  77. Cary slp-70
  78. How to combine 2 signals from 2 gain stages
  79. Increase B+ supply
  80. Aikido Tetra Sans Phono PCB
  81. Loadlines and distortion (6S33S/6S41S)
  82. home theatre bypass feature
  83. Doubling the power of hifi tube amplifiers
  84. Can this tube be used in audio amplifier?
  85. 100 V OPT
  86. Help me understand tube chart data
  87. Listening preference....
  88. tube socket legs?
  89. Stand alone gain stage pre-amp
  90. I kinda sorta burned up my K12-G power transformer
  91. RCA-182 Tube Amp
  92. Transformer potting material? what material?
  93. Ultimate 6xEL34 PPP monoblocks? Hopefully with your help :)
  94. tube amp/pre in car?
  95. Thorsten's tube Stage for TDA1541A
  96. Please help me identify these .45 3kv TRW caps
  97. Convert Gates pre-amp to DC filament?
  98. any suggestions for a mid-amp transformer for a hybrid design... like this circuit...
  99. how much C is too much C?
  100. fisher 70AZ
  101. RE: My first attempt at using Tube Cadd
  102. Srpp simple explanation
  103. Driver for a 807 em triode mode...help !!!
  104. 6J6-based SSMH?
  105. Small tube amp based on 6N6P
  106. replacement for Ei 12BH7AEG
  107. Preamp input tube noise
  108. How much is too much for a 6L6GB?
  109. What is the proper way to measure transformer inductance?
  110. Audio Research LS8 mod. to MKII
  111. Futterman stage max input
  112. How important is ESR in PS Caps?
  113. Pushing 6p14p too hard
  114. Who can tell me in Rome where can i buy antique Vacuum tube?
  115. Is the YAQIN MS-12B (220v +-10%) safe to use in UK
  116. Priboi biasing
  117. Whither Westrex ?.
  118. Tube Phono Pre-Amplifiers
  119. Pioneer SA400 -- Headphones hum, speakers don't. Why?
  120. DIY tube amps for surround sounds?
  121. Bad solder joints in Fender Deluxe VM
  122. Rotary switch for attenuator
  123. What is Matise circuit?
  124. 6bq5 red plating
  125. Technical questions about Melos MA-333
  126. What's this in old Fender amps?
  127. idiot proof mono push pull 6l6gc schematic wanted
  128. Passive Preamp Mod help
  129. KT77 OPT impedance
  130. i think i'm thru with 2A3 tubes
  131. VTC4U? Is that the name of the tube tower/shroud seller?
  132. 8417 triode el.. Mod??'s
  133. Gramp's Zenith MLT 15
  134. Class A tube amplifier Kit
  135. IERC tube coolers for EL34 on the Bay
  136. Stromberg Carlson ASR 433
  137. quads11&22 back into service
  138. New Tubes for sale
  139. Best design for Lundahl LL1679/PP
  140. 12U7 LTP vs. 6922 cascode
  141. Need help calculating value of balancing resistors
  142. 12ax7 12au7 preamp
  143. Western Electric 471A...any information ?
  144. Please Reply
  145. tube line preamplifier circuit
  146. 6L6 Ultralinear cathode Follower
  147. Grid current operation
  148. 431 based screen supply
  149. Where did all the money go?
  150. Hyperx soft start any good for valve amp situation?
  151. Class AB2, Class B, and Hifi
  152. PP 6b4g bad / distorted channel diagnostics
  153. Transformer usage ??
  154. Phono Amplifier
  155. Need EL84 Brand Identification
  156. RCA Octagon dating
  157. Most Accurate Bias Testing Method
  158. ASL AQ1003DT schematic or manual?
  159. Penta brand 6L6GC info?
  160. Mod to SE 6SN7 - 6V6 amp
  161. adjust filament ECC82/83
  162. Clear out of old valves - advice needed
  163. Help ID this OPT
  164. Help? 6n23p cathode follower
  165. DC Heater Caps
  166. Load Line and Biasing for Class AB 6550 power amp
  167. Amp project help needed
  168. LTP with CCS and feedback
  169. Clarion simple 2A3 amplifier
  170. Another question about plate curves and pentode load lines
  171. 5V Indrect Heated Rectifiers?
  172. Easy CCS
  173. I just setup my mimiwat n3 with a pair of Energy cb-20 speakers
  174. First watt F2/little dot MK III
  175. Old Motorola console tube amp, fuse problem
  176. How much performance difference w/ this config?
  177. 6P8S datasheet, help !!
  178. DHT IMD
  179. How to calculate OPT transformer windings
  180. Newbie Questions
  181. Building a Harmonic Distortion Generator
  182. plate curves and max ratings questions
  183. Heater-cathode DC conduction resistance
  184. EL 84 Capacitor Equivalent
  185. How do they get away with this?
  186. well-loved Sherwood "popping" prob mouse pee
  187. Tube Newb: 12sn7 and 12sl7 interchangeable?
  188. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  189. sonic frontiers sfm-75
  190. Chinese tube amp mods?
  191. PSU for JE Labs Simple 45/2A3
  192. frustrated ,Bought a 845 NOS - springs are discconnected need help
  193. Running water sound in amp
  194. Peerless 16458 output transformers
  195. Noisy high-gain preamplifier
  196. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  197. 2A3 single plate RCA/Cunningham tube prices
  198. output transformer power rating
  199. Rectifier Foward Voltage?
  200. Help With 6Y6 amp
  201. What are 12AT7/ECC81 power drivers ?
  202. Help with these Russian GU50 tube amplifier
  203. Eico ST-70 Supermods
  204. Mullard PZ30, how's its Peak Inverse Voltage?
  205. Optical compressor project
  206. 12AU7 in cascode configuration
  207. Bad tube in old record player?
  208. check this out glas-fiber cartridge
  209. cathode caps
  210. Aikido HV PSU
  211. Distance between 6N23P and a cap?
  212. solid and strand wire in amp
  213. Phillips Music Sudio
  214. LTPI Grid stopper value affect on harmonics
  215. WTF. What's going on here.
  216. 7-pin pcb mount socket with shield?
  217. SIMPLE remote volume control with alps motorized pot
  218. Hybrid Partial Feedback SE Amplifier
  219. HV +B Connector
  220. Eico experts needed: PEC in 2050 driver stage bad
  221. Best sounding linestage/buffer topology?
  222. Using ECC88
  223. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  224. EL34 cathode bias PA
  225. Tube Amp Art
  226. Quick OT Question
  227. Power Transformer
  228. ampex 354? some questions
  229. Good power Filter Capacitors
  230. Fisher 101d blow fuse
  231. Valco Model 1200 help
  232. Jolida 502A lost output...?
  233. Codename "Tapyrus", my ongoing DIY headphone amp
  234. RIAA preamp with DHTs
  235. Dynaco Mark VI feedback values
  236. Eagle PCB
  237. Ode to Tube Rollers
  238. switching tubes: good or bad idea?
  239. COnn Organ Amp DI266 Info 12v6GT tubes
  240. Please help me figure out why my plate voltage is too high here
  241. Yaqin MC10L Question for the Guru's
  242. PP PSU: How much ripple is too much ripple?
  243. Bypass caps in choke PS
  244. Grounded Grid TRANSCENDENT line stage
  245. Battery Powered Tube Amp
  246. 5Z4PJ 6N2J
  247. Almost there! opinions are welcomed(6C33SET)
  248. Speaker impedance and amp matching?
  249. r core or toroidal output trafo for dynaco st70
  250. Heathkit Returns

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